Method for Measurement and Report of Channel State Information for Network Cooperative Communication

1. A method performed by a terminal in a wireless communication system, the method comprising: receiving, from a base station, resource configuration information for channel state information (CSI), wherein a channel state information-reference signal (CSI-RS) resource set including a plurality of CSI-RS resources for a channel measurement is configured based on the resource configuration information, and 2 sets of non-zero power (NZP) CSI-RS resources for non-coherent joint transmission (NC-JT) CSI measurement are configured within the CSI-RS resource set; measuring NC-JT CSI for multiple transmission and reception points (TRPs) based on the at least one of the 2 sets within the CSI-RS resource set; and transmitting, to the base station, a CSI report based on the measured NC-JT CSI, wherein each of the 2 sets comprises at least two NZP CSI-RS resources, among the plurality of CSI-RS resources within the CSI-RS resource set, and wherein a same NZP CSI-RS resource is associated with the 2 sets.

2. The method of claim 1, further comprising: measuring CSI for a single TRP, wherein the CSI report comprises CSI selected among the CSI for the single TRP and the NC-JT CSI for the multiple TRPs.

3. The method of claim 1, further comprising: identifying a number of CSI processing units (CPUs) for calculation of the NC-JT CSI measured based on the at least one of the 2 sets, wherein the number of CPUs for calculation of the NC-JT CSI is proportional to a number of NZP CSI-RS resources included in each of the 2 sets, and wherein the number of CPUs for the NC-JT CSI is occupied for calculation of the NC-JT CSI.

4. The method of claim 1, further comprising: transmitting, to the base station, capability information of the terminal including information indicating whether the NC-JT CSI is supported by the terminal.

5. A method performed by a base station in a wireless communication system, the method comprising: transmitting, to a terminal, resource configuration information for channel state information (CSI); and receiving, from the terminal, a CSI report based on non-coherent joint transmission (NC-JT) CSI for multiple transmission and reception points (TRPs), wherein a channel state information-reference signal (CSI-RS) resource set including a plurality of CSI-RS resources for a channel measurement is configured based on the resource configuration information, wherein 2 sets of non-zero power (NZP) CSI-RS resources for NC-JT CSI measurement are configured within the CSI-RS resource set, wherein each of 2 sets comprises at least two NZP CSI-RS resources, among the plurality of CSI-RS resources within the CSI-RS resource set, wherein the NC-JT CSI for the multiple TRPs is derived based on the at least one of the 2 sets within the CSI-RS resource set, and wherein a same NZP CSI-RS resource is associated with the 2 sets.

6. The method of claim 5, further comprising: selecting one among CSI associated with a single TRP and the NC-JT CSI for the multiple TRPs.

7. The method of claim 5, wherein a number of CSI processing units (CPUs) associated with the NC-JT CSI based on the at least one of 2 sets is proportional to a number of NZP CSI-RS resources included in each of the 2 sets.

8. The method of claim 5, further comprising: receiving, from the terminal, capability information of the terminal including information indicating whether the NC-JT CSI is supported by the terminal.

9. A terminal comprising: a transceiver configured to transmit and receive at least one signal; and a controller coupled with the transceiver, the controller configured to: receive, from a base station, resource configuration information for channel state information (CSI), wherein a channel state information-reference signal (CSI-RS) resource set including a plurality of CSI-RS resources for a channel measurement is configured based on the resource configuration information, and 2 sets of non-zero power (NZP) CSI-RS resources for non-coherent joint transmission (NC-JT) CSI measurement are configured within the CSI-RS resource set; measure NC-JT CSI for multiple transmission and reception points (TRPs) based on the at least one of the 2 sets within the CSI-RS resource set; and transmit, to the base station, a CSI report based on the measured NC-JT CSI, wherein each of the 2 sets comprises at least two NZP CSI-RS resources, among the plurality of CSI-RS resources within the CSI-RS resource set, and wherein a same NZP CSI-RS resource is associated with the 2 sets.

10. The terminal of claim 9, wherein the controller is further configured to: measure CSI for a single TRP, wherein the CSI report comprises CSI selected among the CSI for the single TRP and the NC-JT CSI for the multiple TRPs.

11. The terminal of claim 9, wherein the controller is further configured to: identify a number of CSI processing units (CPUs) for calculation of the NC-JT CSI measured based on the at least one of the 2 sets, wherein the number of CPUs for calculation of the NC-JT CSI is proportional to a number of NZP CSI-RS resources included in each of the 2 sets, and wherein the number of CPUs for the NC-JT CSI is occupied for calculation of the NC-JT CSI.

12. The terminal of claim 9, wherein the controller is further configured to: transmit, to the base station, capability information of the terminal including information indicating whether the NC-JT CSI is supported by the terminal.

13. A base station comprising: a transceiver configured to transmit and receive at least one signal; and a controller coupled with the transceiver, the controller configured to: transmit, to a terminal, resource configuration information for channel state information (CSI); and receive, from the terminal, a CSI report based on non-coherent joint transmission (NC-JT) CSI for multiple transmission and reception points (TRPs), wherein a channel state information-reference signal (CSI-RS) resource set including a plurality of CSI-RS resources for a channel measurement is configured based on the resource configuration information, wherein 2 sets of non-zero power (NZP) CSI-RS resources for NC-JT CSI measurement are configured within the CSI-RS resource set, wherein each of the 2 sets comprises at least two NZP CSI-RS resources, among the plurality of CSI-RS resources within the CSI-RS resource set, wherein the NC-JT CSI for the multiple TRPs is derived based on the at least one of the 2 sets within the CSI-RS resource set, and wherein a same NZP CSI-RS resource is associated with the 2 sets.

14. The base station of claim 13, wherein the controller is further configured to: select one among CSI associated with a single TRP and the NC-JT CSI for the multiple TRPs.

15. The base station of claim 13, wherein a number of CSI processing units (CPUs) associated with the NC-JT CSI based on the at least one of the 2 sets is proportional to a number of NZP CSI-RS resources included in each of the 2 sets.

16. The base station of claim 13, wherein the controller is further configured to: receive, from the terminal, capability information of the terminal including information indicating whether the NC-JT CSI is supported by the terminal.